2nd Gen Non-Engine/Transmission How fast in 4x4

[rnolen]

I am trying to figure out how fast you can go in 4 wheel drive. I know this is kind of a strange question. I know it is strange because one gets to the point that if you are in 4x4 and you are going 65mph, should you reallly be in 4 wheel drive? I am asking it for passing situations. I have heard the fastest you should go is 45 mph, but l needed to pass someone this morning and I rose to a speed of about 55 mph. I know if the limit is 45 it probably wont hurt anything to go above for a little bit. This has been nagging at me all day.



Thanks and sorry for the strange question

Russell

 

[JL penner]

Wow, I thought it was around 65! I drove about 150 miles on ice around 55 -60 miles an hour. Hope I didn't hurt anything.

 

[Bob4x4]

Well I have only been to 93 mph in 4x4 8k lbs in the 1/4.

I would not worry about your road speed in 4x4 as long as your truck is in good shape.



Bob

 

[paulb]

I am trying to figure out how fast you can go in 4 wheel drive. I know this is kind of a strange question. I know it is strange because one gets to the point that if you are in 4x4 and you are going 65mph, should you reallly be in 4 wheel drive? I am asking it for passing situations. I have heard the fastest you should go is 45 mph, but l needed to pass someone this morning and I rose to a speed of about 55 mph. I know if the limit is 45 it probably wont hurt anything to go above for a little bit. This has been nagging at me all day.



Thanks and sorry for the strange question

Russell

I'm usually at about 105mph by the end of the 1/4 mile. Even though the lever is out of 4x4, it doesn't disengage until after I back off on it. Of course I don't think I would want to make any sharp turns at that speed... .



Paul

 

[0013]

i would guess you'd be fine in 4 hi at any speed going straight on a non-slippery road. its when your turning (and how sharp) on a non-slippery that puts stress on the front diff. just my . 02

chris

 

[biggy238]

I wouldn't do it over 50 unless you know your tires and gears are in good shape. Mine didn't like 60mph the night I was running on ice (loooong story). It roared and growld around. . Didn't hurt anything though. If yo plan on it habitually though, consider a synthetic gear oil with the right modifiers. It will atleast keep the diffs cooler if nothing else.

 

[snowracer69]

I too have been well over 105 MPH (probably 115+) in 4x4. No harm, no foul.



However, as Paul stated, the lever was out of the 4x4 position on the shift into 2nd gear. But, without the throttle being lifted, there is no way for it to actually disengage, so it's still in 4x4 till through the 1/4.

 

[BigIronRam]

I am trying to figure out how fast you can go in 4 wheel drive. I know this is kind of a strange question. I know it is strange because one gets to the point that if you are in 4x4 and you are going 65mph, should you reallly be in 4 wheel drive? I am asking it for passing situations. I have heard the fastest you should go is 45 mph, but l needed to pass someone this morning and I rose to a speed of about 55 mph. I know if the limit is 45 it probably wont hurt anything to go above for a little bit. This has been nagging at me all day.



Thanks and sorry for the strange question

Russell

If I recall correctly, we're allowed to engage 4 hi at speeds up to 55 MPH? I have no idea about a speed limit for 4wd operation.



Robert

 

[jrobinson2]

On the late second gen's and all the third gens there is no axle disconnect so all the 4wd parts turn full speed anyway, the only issue would be binding between the front and rear and if you are in 4wd it probably is slick enough to not bind.



Jared

 

[rnolen]

Where we live the snow can get pretty deep and coming to work I sometimes need 4x4. Usually when I am in 4x4 the roads don't warrant anything of 45, but it is something to keep in mind for other places. jrobinson2, what do you mean by late second gen's? I have a 97 does that fit into the late second gen's?



Thanks for all the replies



Russ

 

[Alphacowboy]

Where we live the snow can get pretty deep and coming to work I sometimes need 4x4. Usually when I am in 4x4 the roads don't warrant anything of 45, but it is something to keep in mind for other places. jrobinson2, what do you mean by late second gen's? I have a 97 does that fit into the late second gen's?



Thanks for all the replies



Russ

nope, the 2002 models have no CAD, even heard of some of the 2001. 5 models also not haveing a CAD



I always use 4x4 when the roads are a bit slick, more stable driving and it wont hurt the drivetrain any. transfer case will survive higher speeds, it makes it turning that fast in 2wd, so why wouldnt it be ok spining that fast with adding the front ds? I see no issues.

 

[cyborg]

I believe unless you have some means of slippage between the front and rear axles you will have a binding issue between the axles. because nothing is perfect, there are minute differences in the size difference of the tires, when the front and rear drive shafts turn at different speed, there is bind at the transfer case, whick will cause premature wear (and failure) of the internal components of the transfer case, u-joints. 4wd is intended for slippery surfaces and that slip on the road surface provides the differential action between axles. When you have to back up to get into 2wd its because of the binding between the axles. That bind is streching that chain for all its worth, factor in the weight on the front axles that gives us the traction, And the torque we all love so much and POW, somethig gives!

There was a company selling a viscous coupling for the front drive shaft that would allow driving in 4wd without the bind.



That is the reason I love my jeep with its 242 transfer case. The 242 in full time mode allows for slippage and you can use when the roads are a little slick.